Centrifugal pump.



PATENTED FEB. 4, 1908.

W. H. THORNE.

CENTRIPUGAL PUMP.

APPLICATION FILED AUG.23.1907.

NMN.

W/T/VESSES: Mm

UNITED STATES PATENT OFEIOE.

WILLIAM H. THORNE, OF MOUNT AIRY, PENNSYLVANIA, ASS-IGNOR TO WILLIAM SELLERS AND COMPANY, INCORPORATED, OF PHILADELPHIA, PENNSYLVANIA, A CORPORATION OF PENNSYLVANIA.

CENTRIFUGAL PUMP.

Patented Feb. 4, 190e.

Application filed August 23.1907. Serial No. 389.769.

- To all whom it may concern.' l

l. a' construction in which the pum shaft is ing,'and thus around the s practica ly throughout the entire length of vof grit in the Water, which, if the ordinary tion of this t I ows: The pump shaft is provided throughout Be it known that I, WILLIAM H. THORNE, a citizen of the United States, residing `at Mount Airy, -county of Philadelphia, and State of Pennsylvania, have invented .a new and useful Improvement in Centrifugal Pumps, of which the following is a'full, clear, and exact description, reference being had to the accompanying drawings, which form a art of this specification.

y invention relates to centrifugal pumps and particularly to small pumps of this character which are used for conveying Water or other fluids for cooling or lubricating the bearingsof machinery or cutting'l tools or grinding wheels. Such pumps work best when immersed below the surface of the fluid to be lifted. It is generallymost conven ienttov drive such pumps from a horizontal shaft as then no c ange in the direction is necessitated. lWith the class of machines with which my centrifugal pump is designed to be used, there is a considerable amount construction and a horizontal drive be used, will result, when the water is forced around the shaft, in causing the shaft to be cut and abraded. Hence, in the ordinary construce of pumps, the pump shaft 'is vertical Aan the change of direction is oblained by means of bevel gears or carrier pu e s.V .s

Itis the object of my invention to provide horizontal and yet no liquid 'is a lowed to. escape from the tank throu h theshaft openaft-at the same time to rovide a bearing/for the pump shaft theJ-shaft. I- also provide 'means whereb the .shaft may be .effectually lubricate These'and certain details of construction, to prevent the lateral movement of the shaft, orm the objects of my invention. Speaking enerally, I accomplish these results as` fol- Vpractically its entire 4`length with a gland movable longitudinally of the shaft. Between the pump en`d of this shaft and a ange 0 11 the pump casin is interposed a packing which makes a flui -ti ht joint. The gla'n is moved. longitudina ly and the packing forced against the casing by a screw cap. Through this gland I provide an oiling orifice or orifices and through the casing leading to these oiling orifices I provide oiling channels.

The construction whereby the shaft is-held from longitudinal movement will more readily be seen by reference to the embodiment of my invention illustrated in the drawings.

In the drawings illustrating an embodiment of my invention, Figure 1v is a sectional view showing a pump immersed in the Huid. Fig. 2 is an enlarged perspective view of the pump disk and vanes.

a is the tank containing the fluid in which the lpump is submerged.

b is the pump casing, c the pump shaft, d the driving pulley for the same. The end of the shaft c opposite the pulley is reduced and threaded.

e is the pump disk having the vanes f. The hub of the disk e has an orifice which is threaded and by means of which the disk is lsecured upon the threaded end of the shaft.

The pump disk is inclosed with a cover g,

aving a central aperture 7L, through which the iuid passes to the disk. The cover g'is secured by bolts y tothe casing b, so that there is formed a closed box for the ump having the aperture h for the admission ofl the iiuid and the outlet j throu h which, by the disk vanes, the fiuid is force to the point where it is to be used. With the construction thus described, when the pump is in action, the fluid in the outlet y' `and in the `receiving chamber 7: in the cover g is under pressure. Being under pressure, Ythe Huid tends to escape, around the outside ofthe disk e and along the bearing of the shaft c.

.As the Huid, with the specific uses of my pump, contains grit and other abrading material the shaft becomes abrade'd. It is this difficulty which has heretofore caused the pump to be placed vertically," necessitating the use of bevel gears or carrier pulleys. In the construction -of this invention I rovide a long gland which surrounds the s aft c and forms a bearing for the shaft throughout practically its entire-length. Between the inner end of this gland` and a flange n on the pump casin b, formin an abutment, I

mterpose a pac ing o. T is packing ma be of leather, flax or other suitable materia p is a screw cap' workin on a threaded hub from the casmg b. 's screw cap has a ace r which is inline with the outer end 4of gland Z. By turning this screw capin one flange n and prevents the passage of the fluid to the shaft. By turning the screw cap in the other direction, the compression of the packingv4 is released and the gland may be moved longitudinally, in the other-direction, the projection s thereon .facilitating this vmovement, and the cap and Agland can be removed for the purpose of renewing the packing'.

Through the gland is the oil orifice t, although I do not intend to limit myself to one suchorifice, and through the casing is the oil passage or hole u communicating with an annular space t of sufficient length to compdiensate for the different positions of the glan I have found in practice that since thereis a greater pressure in the outlet y' and chamber 7c than at the opening or aperture 7L, the fluid passing behind the disk e will tend to move it toward the cap or cover g until the vanes come in contact with the conical s urface of such cap or cover. When this occurs the vanes wear 'away with considerable rapidity. In my invention I obviate this in the follow ing mannerv is a cylinder Vpreferably of hardwood of a suitable character, for instance, lignum-vitae. This cylinder is carried on the end of a screw w which passes through a threaded orifice in the cross-bar .'12, secured by the bolts ly to the casing. By turning the screw fw the inner end of the cylinder v will contact with the shaft in the hub of the disk and prevent the disk moving toward the cover. By means of the jam nut z the cylinder v may be maintained in the desired position, after adjustment or readjustments, to accommodate for wear. Thus the shaft is prevented from longitudinal movement in that direction.

By the invention described, I prevent-the passage of the liuid to the shaft and the cutting or abrading which would occur if it did so pass. I thus avoid, with the uses for which my pump is designed, the necessity of using a vertical pump shaft with its required means to change direction and can use a horizontal shaft. Further, I provide a bearing for substantially theentire shaft, the vonly portion not having such bearing is at the point whereI the packing is situated, which isnegligible. Further, I can readily oil the shaft. Finally, I preventA any inward movement of the disk and the consequent wearing of the vanes. s

Having now fully described my invention, what I claim and desire to protect by Letters Patent is:

1. In a centrifugal pump of the character l described, the combination With the disk and its driving shaft, of a movable stop in the water chamber of the pump on the inlet side of the disk and in line with the axis of the disk, and means to adjust the position of said sto 2i.) In acentrifugal'pump of the character described, the combination with the cover forming the water chamber, the disk and its driving shaft, of a movable stop in the water chamber of the pump in line with the axis of the disk and between the disk and the cover, and means to adjust the position of said stop. i

3. In a centrifugal pump of the character described, the combination with the disk and its driving shaft, of a cylinder in the Water chamber of the pump and in line with the axis of the disk, a screw to which said cylinder is secured, a fixed bar having a threaded .f

orifice in which said screw works.

4. In acentrifugal pump of the character described, thecombination with the disk and its driving shaft, cfa cylinder in the water chamber of the pump and in line with the axis of the disk, a screw to which said cylin` der is secured, a fixed bar having a threaded orifice in which said screw works, and means to lock said screw from rotation.

5. In a centrifugal pump of the character described, the combination with the disk and its driving shaft, of a cylinder in the water chamber of the pump and in line with the axis of the disk, a screw to which said cylinder is secured, a fixed bar having a threaded orifice in which said screw-works, and a jam nut to lock said screw from rotation.

In testimony of which invention, I have hereunto set my hand. .j

WM. H. THORNE. Witnesses:

ROBT. T. BICKNELL, E. E. WALL. 

